This Duovid is a high-aperture, high-performance set of binoculars that becomes a mini spotting scope with a simple flick of the wrist. In the 10x position, it offers a steady image with a large depth of field. Changing to 15x allows for a level of detail recognition that was previously reserved for spotting scopes. All of this with using both eyes! Because of its excellent imaging performance, the 50 mm Duovid is especially suited for astronomical viewing, and the necessary tripod adapter is included with the binoculars. The ergonomic form and tactile rubber reinforcement ensure a sure grip - even in wet and with gloves - and for good image steadiness.